You can download NuSOAP library from the NuSOAP project is hosted by SourceForge. It is a package of php files you can keep in your php document directory or in a separate directory. In my case, I copied /lib directory from the NuSOAP project under /usr/local/apache2/htdocs/ which is default location of documents for the apache2 server. Then, copied /sample directory of the NuSOAP project under the same directory, /usr/local/apache2/htdocs/. You can download document from the same site. It contains nusoap method summary. Now, it's time to build a WS client..